Question

pls......................................​

Answer 1

Răspuns:

Explicație pas cu pas:

A = {-3; 2; 7}

B = {a; b}

A x B = {(-3; a); (-3; b); (2; a); (2; b); (7; a); (7; b)}

B x A = {(a; -3); (a; 2); (a; 7); (b; -3); (b; 2); (b; 7)}

B x B = {(a; a); (a; b); (b; a); (b; b)}

A x A = {(-3; -3); (-3; 2); (-3; 7); (2; -3); (2; 2); (2; 7); (7; -3); (7; 2); (7; 7)}

(-3; a) ∈ A x B adevarat

(a; 7) ∈ A x B fals

(7; b) ∈ B x A fals

(b; a) ∈ B x B adevarat

(7; b) ∈ A x B adevarat

(b; 2) ∈ B x A adevarat

(b; a) ∈ B x A fals

(-3; -3) ∈ A x A adevarat